Unrecognizable USB device?

A HP P4 1.8 less than 2 1/2 years old with XP Home will not accept a HP 3520 printer. It was restored recently from onboard image. What could be the reason for the error message? The applications load on slow, as well. It did have an undetected virus on the unprotected machine (the reason for the rebuild-the antivirus had not been updated due to subscription). It was possibly SWEN virus. I have tried different USB cords and loading procedures.